Bank One Sensor One

[GSS123]

Daughters car........1994 V-6 Camry. Had Auto Zone pull the engine code and they tell me I have problems with the O2 sensor on Bank One Sensor One. No big deal until I decide its the sensor nearest to the firewall. You can just barely get a 22mm wrench on the senor and I had no idea how I was going to unplug the sensor from the wiring harness. The plug is stuck behind a bunch of plumbing and the intake. So I do what a good shade tree mechanic should do.......... I take all pain in the ass jobs to a good garage.

$252.82 dollars later the check engine light is off and I have a new O2 sensor on exhaust manifold near the radiator. The shop write up says they replaced Bank One Sensor One.

This is the opposite side of the engine from what I thought. This is a very easy sensor to replace so did I out smart myself?

My question is what side of a 1994 V6 engine is Bank One Sensor One. The front side nearest the radiator or the back side nearest the firewall?

I asked my daughter to keep an eye on the check engine light.......we may be back to the shop.

[DFBonnett]

According to the shop manual, available here.. http://oregonstate.edu/~tongt/camry .., it is the sensor nearest the firewall.
See page 436 in the EG2 section.

[Scrapper]

thats alot of money for putting in o/2 sensor...you should have went and got you the socket that takes them out it has a split in the socket so you don't break the wire...ohwell whats done is done..did you call parts stor and see what the o/2 sensor cost or did you buy it and and let them put it in?? if you never bought it i'd call and see what it cost. at autozone or advanced.....

[ProMan]

They replaced the wrong sensor. The CEL is off because they erased the code. It will come back on soon. Go back to the shop and bring a print out of the FSM sheet and ask to have it corrected.

B1S1 is always the one closest to the firewall. It's a pain to replace though.

[papirringo]

mmh I think the B1S1 is the closest to cylinder 1, but I might be wrong

[GSS123]

Got home last night night and my daughter said the check engine light came back on. So we drove it over to the shop and placed a note along with the keys in the key drop box. Let the games being. Should be an interesting phone call.

If it had been the front O2 sensor I would have changed it myself. But the rear O2 sensor is a pain. Sensor removal isn't to bad but disconnecting it from the wiring harness is a bitch.

I'll update this thread when I know more.

Just recieved a phone call. They put in another O2 sensor at no charge. This time on the correct side. So I now have Bank 1 and Bank 2 upstream sensors replaced. Hopefully this will end the check engine light issue.